The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 1996
Filed:
Jul. 27, 1994
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
There are described benzophenoneazo dyes of the formula ##STR1## where the ring A can be benzofused and a benzofused ring A can be overbridges, m is 1 or 2, K is the radical of a coupling component, Y is hydrogen or arylazo, one of the two radicals X.sup.1 and X.sup.2 is hydrogen and the other is hydroxysulfonyl, R.sup.1, R.sup.2 and R.sup.3 are independently of the others hydrogen, halogen, C.sub.1 -C.sub.12 -alkyl, cyclohexyl, phenyl, 2-hydroxy-ethylsulfonyl or C.sub.1 -C.sub.4 -alkoxy or, when m is 1 and Y is hydrogen, one of these substituents can also be the radical of the formula ##STR2## where L.sup.1 is a chemical bond or a bridge member, and X.sup.1, X.sup.2, R.sup.4, K and the ring A are each as defined above, and R.sup.4 is hydrogen, halogen or C.sub.1 -C.sub.4 -alkoxy, with the proviso that there is at least one water-solublizing group in the molecule, novel pyridone compounds, a process for preparing disulfonated pyridone compounds, and the use of the novel dyes for dyeing natural or synthetic substrates.